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"We were informed by COMAC earlier this month about their planned study. We have no objection to that, though we are not aware what prompted COMAC to conduct such a study on the general issue of main bursts," the spokesman said.
"Our department has from time to time received complaints from consumers of inconvenience caused by the sudden interruption of water supply as a result of main bursts.
"However, we have never received one single case of complaint through COMAC regarding maladministration leading to injustice to any member of the public on main bursts."
He pointed out that over the years, the department had all along been carrying out programmes to improve and replace water mains that were more problematic.
"Waste detection activities have started since the 1950s to identify leaks in water mains for early repairs before they develop into burst," he said.
"However, some 80 per cent of the main bursts were caused directly or indirectly by other activities outside our control.
"We therefore set up dedicated inspection teams in mid-1993 to check construction activities in the vicinity of water mains to reduce the chance of water mains being damaged.
"We also maintain regular co-ordination with the Highways Department and the utility companies. and remind contractors from time to time to avoid damaging water mains."
Meanwhile, the spokesman said, the department was in the process of conducting an underground asset management study.
"This will help us to know more accurately about the condition and performance of the water mains and to develop a comprehensive and cost-effective asset management plan. with a view to undertake preventive maintenance or replacement of water mains in a more systematic and scientific manner," he said.
End